IEEE Standard for Preferred Ratings,Related Requirements, and Application Recommendations for Low-Voltage AC (635 V and below)and DC (3200 V and below) Power Circuit Breakers

This standard defines the preferred ratings for low-voltage AC (635 V and below) power circuit breakers, general purpose DC (325 V and below) power circuit breakers, heavy duty low voltage DC (3200 V and below) power circuit breakers, and fused (integrally or non-integrally) low voltage AC (600 V and below) power circuit breakers.